The highly infectious Omicron coronavirus variant causes less severe disease than the Delta strain but it remains a "dangerous virus", particularly for those who are unvaccinated, the head of the World Health Organisation (WHO) said on Wednesday (Jan 12).<br /><br />WATCH MORE: https://thestartv.com/c/news<br />SUBSCRIBE: https://cutt.ly/TheStar<br />LIKE: https://fb.com/TheStarOnline
